/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.naming.resources;

import org.apache.naming.NamingEntry;

import javax.naming.*;
import javax.naming.directory.*;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;

/**
 * WAR Directory Context implementation.
 *
 * @author Remy Maucherat
 */
public class WARDirContext extends BaseDirContext {

	private static final org.apache.juli.logging.Log log =
			org.apache.juli.logging.LogFactory.getLog(WARDirContext.class);

	// ----------------------------------------------------------- Constructors
	/**
	 * The WAR file.
	 */
	protected ZipFile base = null;
	/**
	 * WAR entries.
	 */
	protected Entry entries = null;

	/**
	 * Builds a WAR directory context using the given environment.
	 */
	public WARDirContext() {
		super();
	}


	// ----------------------------------------------------- Instance Variables

	/**
	 * Builds a WAR directory context using the given environment.
	 */
	public WARDirContext(Hashtable<String, Object> env) {
		super(env);
	}

	/**
	 * Constructor used for returning fake sub-contexts or for accessing
	 * META-INF/resources locations in bundled JAR files.
	 */
	protected WARDirContext(ZipFile base, Entry entries) {
		this.base = base;
		this.entries = entries;
	}


	// ------------------------------------------------------------- Properties

	/**
	 * Set the document root.
	 *
	 * @param docBase The new document root
	 * @throws IllegalArgumentException if the specified value is not
	 *                                  supported by this implementation
	 * @throws IllegalArgumentException if this would create a
	 *                                  malformed URL
	 */
	@Override
	public void setDocBase(String docBase) {

		// Validate the format of the proposed document root
		if (docBase == null)
			throw new IllegalArgumentException
					(sm.getString("resources.null"));
		if (!(docBase.endsWith(".war")))
			throw new IllegalArgumentException
					(sm.getString("warResources.notWar"));

		// Calculate a File object referencing this document base directory
		File base = new File(docBase);

		// Validate that the document base is an existing directory
		if (!base.exists() || !base.canRead() || base.isDirectory())
			throw new IllegalArgumentException
					(sm.getString("warResources.invalidWar", docBase));
		try {
			this.base = new ZipFile(base);
		} catch (Exception e) {
			throw new IllegalArgumentException
					(sm.getString("warResources.invalidWar", e.getMessage()));
		}
		super.setDocBase(docBase);

		loadEntries();

	}


	// --------------------------------------------------------- Public Methods

	/**
	 * Release any resources allocated for this directory context.
	 */
	@Override
	public void release() {

		entries = null;
		if (base != null) {
			try {
				base.close();
			} catch (IOException e) {
				log.warn
						("Exception closing WAR File " + base.getName(), e);
			}
		}
		base = null;
		super.release();

	}

	/**
	 * Return the real path for a given virtual path, if possible; otherwise
	 * return <code>null</code>.
	 *
	 * @param path The path to the desired resource
	 */
	@Override
	protected String doGetRealPath(String path) {
		return null;
	}


	// -------------------------------------------------------- Context Methods

	/**
	 * Retrieves the named object.
	 *
	 * @param strName the name of the object to look up
	 * @return the object bound to name
	 */
	@Override
	protected Object doLookup(String strName) {

		Name name;
		try {
			name = getEscapedJndiName(strName);
		} catch (InvalidNameException e) {
			log.info(sm.getString("resources.invalidName", strName), e);
			return null;
		}

		if (name.isEmpty())
			return this;
		Entry entry = treeLookup(name);
		if (entry == null)
			return null;

		ZipEntry zipEntry = entry.getEntry();
		if (zipEntry.isDirectory())
			return new WARDirContext(base, entry);
		else
			return new WARResource(entry.getEntry());
	}

	/**
	 * JNDI treats ' and " as reserved characters therefore they need to be
	 * escaped as part of converting file names to JNDI names. Note that while
	 * ' can be used in Windows and Unix file names, " is only valid on Unix.
	 * This method assumes that the string is currently unquoted.
	 *
	 * @return A valid JNDI name
	 * @throws InvalidNameException
	 */
	private Name getEscapedJndiName(String name) throws InvalidNameException {
		return new CompositeName(name.replace("'", "\\'").replace("\"", ""));
	}

	/**
	 * {@inheritDoc}
	 * <p>
	 * This method is not supported in this implementation
	 *
	 * @throws OperationNotSupportedException for this implementation
	 */
	@Override
	public void unbind(String name) throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Binds a new name to the object bound to an old name, and unbinds the
	 * old name. Both names are relative to this context. Any attributes
	 * associated with the old name become associated with the new name.
	 * Intermediate contexts of the old name are not changed.
	 *
	 * @param oldName the name of the existing binding; may not be empty
	 * @param newName the name of the new binding; may not be empty
	 * @throws javax.naming.NameAlreadyBoundException if newName is already
	 *                                                bound
	 * @throws NamingException                        if a naming exception is encountered
	 */
	@Override
	public void rename(String oldName, String newName)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Enumerates the names bound in the named context, along with the
	 * objects bound to them. The contents of any subcontexts are not
	 * included.
	 * <p>
	 * If a binding is added to or removed from this context, its effect on
	 * an enumeration previously returned is undefined.
	 *
	 * @param strName the name of the context to list
	 * @return an enumeration of the bindings in this context.
	 * Each element of the enumeration is of type Binding.
	 * @throws NamingException if a naming exception is encountered
	 */
	@Override
	protected List<NamingEntry> doListBindings(String strName)
			throws NamingException {

		Name name = getEscapedJndiName(strName);

		if (name.isEmpty())
			return list(entries);

		Entry entry = treeLookup(name);
		if (entry == null)
			return null;

		return list(entry);
	}

	/**
	 * {@inheritDoc}
	 * <p>
	 * This method is not supported in this implementation
	 *
	 * @throws OperationNotSupportedException for this implementation
	 */
	@Override
	public void destroySubcontext(String name) throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Retrieves the named object, following links except for the terminal
	 * atomic component of the name. If the object bound to name is not a
	 * link, returns the object itself.
	 *
	 * @param name the name of the object to look up
	 * @return the object bound to name, not following the terminal link
	 * (if any).
	 * @throws NamingException if a naming exception is encountered
	 */
	@Override
	public Object lookupLink(String name)
			throws NamingException {
		// Note : Links are not supported
		return lookup(name);
	}

	/**
	 * Retrieves the full name of this context within its own namespace.
	 * <p>
	 * Many naming services have a notion of a "full name" for objects in
	 * their respective namespaces. For example, an LDAP entry has a
	 * distinguished name, and a DNS record has a fully qualified name. This
	 * method allows the client application to retrieve this name. The string
	 * returned by this method is not a JNDI composite name and should not be
	 * passed directly to context methods. In naming systems for which the
	 * notion of full name does not make sense,
	 * OperationNotSupportedException is thrown.
	 *
	 * @return this context's name in its own namespace; never null
	 * @throws OperationNotSupportedException if the naming system does
	 *                                        not have the notion of a full name
	 * @throws NamingException                if a naming exception is encountered
	 */
	@Override
	public String getNameInNamespace()
			throws NamingException {
		return docBase;
	}


	// ----------------------------------------------------- DirContext Methods

	/**
	 * Retrieves selected attributes associated with a named object.
	 * See the class description regarding attribute models, attribute type
	 * names, and operational attributes.
	 *
	 * @param name    the name of the object from which to retrieve attributes
	 * @param attrIds the identifiers of the attributes to retrieve. null
	 *                indicates that all attributes should be retrieved; an empty array
	 *                indicates that none should be retrieved
	 * @return the requested attributes; never null
	 * @throws NamingException if a naming exception is encountered
	 */
	@Override
	protected Attributes doGetAttributes(String name, String[] attrIds)
			throws NamingException {
		return getAttributes(getEscapedJndiName(name), attrIds);
	}

	/**
	 * Retrieves all of the attributes associated with a named object.
	 *
	 * @param name the name of the object from which to retrieve attributes
	 * @return the set of attributes associated with name.
	 * Returns an empty attribute set if name has no attributes; never null.
	 * @throws NamingException if a naming exception is encountered
	 */
	@Override
	public Attributes getAttributes(Name name, String[] attrIds)
			throws NamingException {

		Entry entry = null;
		if (name.isEmpty())
			entry = entries;
		else
			entry = treeLookup(name);
		if (entry == null)
			return null;

		ZipEntry zipEntry = entry.getEntry();

		ResourceAttributes attrs = new ResourceAttributes();
		attrs.setCreationDate(new Date(zipEntry.getTime()));
		attrs.setName(entry.getName());
		if (!zipEntry.isDirectory())
			attrs.setResourceType("");
		else
			attrs.setCollection(true);
		attrs.setContentLength(zipEntry.getSize());
		attrs.setLastModified(zipEntry.getTime());

		return attrs;

	}

	/**
	 * Modifies the attributes associated with a named object. The order of
	 * the modifications is not specified. Where possible, the modifications
	 * are performed atomically.
	 *
	 * @param name   the name of the object whose attributes will be updated
	 * @param mod_op the modification operation, one of: ADD_ATTRIBUTE,
	 *               REPLACE_ATTRIBUTE, REMOVE_ATTRIBUTE
	 * @param attrs  the attributes to be used for the modification; may not
	 *               be null
	 * @throws javax.naming.directory.AttributeModificationException if the
	 *                                                               modification cannot be completed successfully
	 * @throws NamingException                                       if a naming exception is encountered
	 */
	@Override
	public void modifyAttributes(String name, int mod_op, Attributes attrs)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Modifies the attributes associated with a named object using an an
	 * ordered list of modifications. The modifications are performed in the
	 * order specified. Each modification specifies a modification operation
	 * code and an attribute on which to operate. Where possible, the
	 * modifications are performed atomically.
	 *
	 * @param name the name of the object whose attributes will be updated
	 * @param mods an ordered sequence of modifications to be performed; may
	 *             not be null
	 * @throws javax.naming.directory.AttributeModificationException if the
	 *                                                               modification cannot be completed successfully
	 * @throws NamingException                                       if a naming exception is encountered
	 */
	@Override
	public void modifyAttributes(String name, ModificationItem[] mods)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Binds a name to an object, along with associated attributes. If attrs
	 * is null, the resulting binding will have the attributes associated
	 * with obj if obj is a DirContext, and no attributes otherwise. If attrs
	 * is non-null, the resulting binding will have attrs as its attributes;
	 * any attributes associated with obj are ignored.
	 *
	 * @param name  the name to bind; may not be empty
	 * @param obj   the object to bind; possibly null
	 * @param attrs the attributes to associate with the binding
	 * @throws javax.naming.NameAlreadyBoundException            if name is already
	 *                                                           bound
	 * @throws javax.naming.directory.InvalidAttributesException if some
	 *                                                           "mandatory" attributes of the binding are not supplied
	 * @throws NamingException                                   if a naming exception is encountered
	 */
	@Override
	public void bind(String name, Object obj, Attributes attrs)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Binds a name to an object, along with associated attributes,
	 * overwriting any existing binding. If attrs is null and obj is a
	 * DirContext, the attributes from obj are used. If attrs is null and obj
	 * is not a DirContext, any existing attributes associated with the object
	 * already bound in the directory remain unchanged. If attrs is non-null,
	 * any existing attributes associated with the object already bound in
	 * the directory are removed and attrs is associated with the named
	 * object. If obj is a DirContext and attrs is non-null, the attributes
	 * of obj are ignored.
	 *
	 * @param name  the name to bind; may not be empty
	 * @param obj   the object to bind; possibly null
	 * @param attrs the attributes to associate with the binding
	 * @throws javax.naming.directory.InvalidAttributesException if some
	 *                                                           "mandatory" attributes of the binding are not supplied
	 * @throws NamingException                                   if a naming exception is encountered
	 */
	@Override
	public void rebind(String name, Object obj, Attributes attrs)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Creates and binds a new context, along with associated attributes.
	 * This method creates a new subcontext with the given name, binds it in
	 * the target context (that named by all but terminal atomic component of
	 * the name), and associates the supplied attributes with the newly
	 * created object. All intermediate and target contexts must already
	 * exist. If attrs is null, this method is equivalent to
	 * Context.createSubcontext().
	 *
	 * @param name  the name of the context to create; may not be empty
	 * @param attrs the attributes to associate with the newly created context
	 * @return the newly created context
	 * @throws javax.naming.NameAlreadyBoundException            if name is already
	 *                                                           bound
	 * @throws javax.naming.directory.InvalidAttributesException if attrs
	 *                                                           does not contain all the mandatory attributes required for creation
	 * @throws NamingException                                   if a naming exception is encountered
	 */
	@Override
	public DirContext createSubcontext(String name, Attributes attrs)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Retrieves the schema associated with the named object. The schema
	 * describes rules regarding the structure of the namespace and the
	 * attributes stored within it. The schema specifies what types of
	 * objects can be added to the directory and where they can be added;
	 * what mandatory and optional attributes an object can have. The range
	 * of support for schemas is directory-specific.
	 *
	 * @param name the name of the object whose schema is to be retrieved
	 * @return the schema associated with the context; never null
	 * @throws OperationNotSupportedException if schema not supported
	 * @throws NamingException                if a naming exception is encountered
	 */
	@Override
	public DirContext getSchema(String name)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Retrieves a context containing the schema objects of the named
	 * object's class definitions.
	 *
	 * @param name the name of the object whose object class definition is to
	 *             be retrieved
	 * @return the DirContext containing the named object's class
	 * definitions; never null
	 * @throws OperationNotSupportedException if schema not supported
	 * @throws NamingException                if a naming exception is encountered
	 */
	@Override
	public DirContext getSchemaClassDefinition(String name)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Searches in a single context for objects that contain a specified set
	 * of attributes, and retrieves selected attributes. The search is
	 * performed using the default SearchControls settings.
	 *
	 * @param name               the name of the context to search
	 * @param matchingAttributes the attributes to search for. If empty or
	 *                           null, all objects in the target context are returned.
	 * @param attributesToReturn the attributes to return. null indicates
	 *                           that all attributes are to be returned; an empty array indicates that
	 *                           none are to be returned.
	 * @return a non-null enumeration of SearchResult objects. Each
	 * SearchResult contains the attributes identified by attributesToReturn
	 * and the name of the corresponding object, named relative to the
	 * context named by name.
	 * @throws NamingException if a naming exception is encountered
	 */
	@Override
	public NamingEnumeration<SearchResult> search(String name,
	                                              Attributes matchingAttributes, String[] attributesToReturn)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Searches in a single context for objects that contain a specified set
	 * of attributes. This method returns all the attributes of such objects.
	 * It is equivalent to supplying null as the atributesToReturn parameter
	 * to the method search(Name, Attributes, String[]).
	 *
	 * @param name               the name of the context to search
	 * @param matchingAttributes the attributes to search for. If empty or
	 *                           null, all objects in the target context are returned.
	 * @return a non-null enumeration of SearchResult objects. Each
	 * SearchResult contains the attributes identified by attributesToReturn
	 * and the name of the corresponding object, named relative to the
	 * context named by name.
	 * @throws NamingException if a naming exception is encountered
	 */
	@Override
	public NamingEnumeration<SearchResult> search(String name,
	                                              Attributes matchingAttributes) throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Searches in the named context or object for entries that satisfy the
	 * given search filter. Performs the search as specified by the search
	 * controls.
	 *
	 * @param name   the name of the context or object to search
	 * @param filter the filter expression to use for the search; may not be
	 *               null
	 * @param cons   the search controls that control the search. If null,
	 *               the default search controls are used (equivalent to
	 *               (new SearchControls())).
	 * @return an enumeration of SearchResults of the objects that satisfy
	 * the filter; never null
	 * @throws javax.naming.directory.InvalidSearchFilterException   if the
	 *                                                               search filter specified is not supported or understood by the underlying
	 *                                                               directory
	 * @throws javax.naming.directory.InvalidSearchControlsException if the
	 *                                                               search controls contain invalid settings
	 * @throws NamingException                                       if a naming exception is encountered
	 */
	@Override
	public NamingEnumeration<SearchResult> search(String name, String filter,
	                                              SearchControls cons)
			throws NamingException {
		throw new OperationNotSupportedException();
	}

	/**
	 * Searches in the named context or object for entries that satisfy the
	 * given search filter. Performs the search as specified by the search
	 * controls.
	 *
	 * @param name       the name of the context or object to search
	 * @param filterExpr the filter expression to use for the search.
	 *                   The expression may contain variables of the form "{i}" where i is a
	 *                   nonnegative integer. May not be null.
	 * @param filterArgs the array of arguments to substitute for the
	 *                   variables in filterExpr. The value of filterArgs[i] will replace each
	 *                   occurrence of "{i}". If null, equivalent to an empty array.
	 * @param cons       the search controls that control the search. If null, the
	 *                   default search controls are used (equivalent to (new SearchControls())).
	 * @return an enumeration of SearchResults of the objects that satisfy the
	 * filter; never null
	 * @throws ArrayIndexOutOfBoundsException                        if filterExpr contains {i}
	 *                                                               expressions where i is outside the bounds of the array filterArgs
	 * @throws javax.naming.directory.InvalidSearchControlsException if cons
	 *                                                               contains invalid settings
	 * @throws javax.naming.directory.InvalidSearchFilterException   if
	 *                                                               filterExpr with filterArgs represents an invalid search filter
	 * @throws NamingException                                       if a naming exception is encountered
	 */
	@Override
	public NamingEnumeration<SearchResult> search(String name, String filterExpr,
	                                              Object[] filterArgs, SearchControls cons)
			throws NamingException {
		throw new OperationNotSupportedException();
	}


	// ------------------------------------------------------ Protected Methods

	/**
	 * Normalize the name of an entry read from the Zip.
	 */
	protected String normalize(ZipEntry entry) {

		String result = "/" + entry.getName();
		if (entry.isDirectory()) {
			result = result.substring(0, result.length() - 1);
		}
		return result;

	}

	/**
	 * Constructs a tree of the entries contained in a WAR file.
	 */
	protected void loadEntries() {

		try {

			Enumeration<? extends ZipEntry> entryList = base.entries();
			entries = new Entry("/", new ZipEntry("/"));

			while (entryList.hasMoreElements()) {

				ZipEntry entry = entryList.nextElement();
				String name = normalize(entry);
				int pos = name.lastIndexOf('/');
				// Check that parent entries exist and, if not, create them.
				// This fixes a bug for war files that don't record separate
				// zip entries for the directories.
				int currentPos = -1;
				int lastPos = 0;
				while ((currentPos = name.indexOf('/', lastPos)) != -1) {
					Name parentName = getEscapedJndiName(name.substring(0, lastPos));
					Name childName = getEscapedJndiName(name.substring(0, currentPos));
					String entryName = name.substring(lastPos, currentPos);
					// Parent should have been created in last cycle through
					// this loop
					Entry parent = treeLookup(parentName);
					Entry child = treeLookup(childName);
					if (child == null) {
						// Create a new entry for missing entry and strip off
						// the leading '/' character and appended on by the
						// normalize method and add '/' character to end to
						// signify that it is a directory entry
						String zipName = name.substring(1, currentPos) + "/";
						child = new Entry(entryName, new ZipEntry(zipName));
						if (parent != null)
							parent.addChild(child);
					}
					// Increment lastPos
					lastPos = currentPos + 1;
				}
				String entryName = name.substring(pos + 1, name.length());
				Name compositeName = getEscapedJndiName(name.substring(0, pos));
				Entry parent = treeLookup(compositeName);
				Entry child = new Entry(entryName, entry);
				if (parent != null)
					parent.addChild(child);

			}

		} catch (Exception e) {
			// Ignore
		}

	}

	/**
	 * Entry tree lookup.
	 */
	protected Entry treeLookup(Name name) {
		if (name.isEmpty() || entries == null)
			return entries;
		Entry currentEntry = entries;
		for (int i = 0; i < name.size(); i++) {
			if (name.get(i).length() == 0)
				continue;
			currentEntry = currentEntry.getChild(name.get(i));
			if (currentEntry == null)
				return null;
		}
		return currentEntry;
	}

	/**
	 * List children as objects.
	 */
	protected ArrayList<NamingEntry> list(Entry entry) {

		ArrayList<NamingEntry> entries = new ArrayList<NamingEntry>();
		Entry[] children = entry.getChildren();
		NamingEntry namingEntry = null;

		for (int i = 0; i < children.length; i++) {
			ZipEntry current = children[i].getEntry();
			Object object = null;
			if (current.isDirectory()) {
				object = new WARDirContext(base, children[i]);
			} else {
				object = new WARResource(current);
			}
			namingEntry = new NamingEntry
					(children[i].getName(), object, NamingEntry.ENTRY);
			entries.add(namingEntry);
		}

		return entries;

	}


	// ---------------------------------------------------- Entries Inner Class

	/**
	 * Entries structure.
	 */
	protected static class Entry implements Comparable<Object> {


		// -------------------------------------------------------- Constructor

		protected String name = null;


		// --------------------------------------------------- Member Variables
		protected ZipEntry entry = null;
		protected Entry children[] = new Entry[0];
		protected volatile boolean childrenSorted = false;

		public Entry(String name, ZipEntry entry) {
			this.name = name;
			this.entry = entry;
		}


		// ----------------------------------------------------- Public Methods

		@Override
		public int compareTo(Object o) {
			if (!(o instanceof Entry))
				return (+1);
			return name.compareTo(((Entry) o).getName());
		}

		@Override
		public boolean equals(Object o) {
			if (!(o instanceof Entry))
				return false;
			return name.equals(((Entry) o).getName());
		}

		@Override
		public int hashCode() {
			return name.hashCode();
		}

		public ZipEntry getEntry() {
			return entry;
		}

		public String getName() {
			return name;
		}

		public void addChild(Entry entry) {
			Entry[] newChildren = new Entry[children.length + 1];
			for (int i = 0; i < children.length; i++)
				newChildren[i] = children[i];
			newChildren[children.length] = entry;
			children = newChildren;
			childrenSorted = false;
		}

		public Entry[] getChildren() {
			if (!childrenSorted) {
				synchronized (children) {
					if (!childrenSorted) {
						Arrays.sort(children);
						childrenSorted = true;
					}
				}
			}
			return children;
		}

		public Entry getChild(String name) {
			for (int i = 0; i < children.length; i++) {
				if (children[i].name.equals(name)) {
					return children[i];
				}
			}
			return null;
		}


	}


	// ------------------------------------------------ WARResource Inner Class

	/**
	 * This specialized resource implementation avoids opening the IputStream
	 * to the WAR right away.
	 */
	protected class WARResource extends Resource {


		// -------------------------------------------------------- Constructor

		protected ZipEntry entry;


		// --------------------------------------------------- Member Variables

		public WARResource(ZipEntry entry) {
			this.entry = entry;
		}


		// ----------------------------------------------------- Public Methods

		/**
		 * Content accessor.
		 *
		 * @return InputStream
		 */
		@Override
		public InputStream streamContent()
				throws IOException {
			try {
				if (binaryContent == null) {
					InputStream is = base.getInputStream(entry);
					inputStream = is;
					return is;
				}
			} catch (ZipException e) {
				throw new IOException(e.getMessage(), e);
			}
			return super.streamContent();
		}


	}


}

